Also known as: b47d20, 2.0d, 118d engine, 320d engine, modular diesel
The four-cylinder diesel of BMW's modular family — 500 cc per cylinder, shared architecture with the B37 three and B57 six — and the N47's replacement across the volume range.
The reason to know it is not the same engine as the N47 is the timing chain. The N47's rear-mounted chain and its expensive failure are the first thing anybody says about a BMW four-cylinder diesel, and the B47 was substantially revised in exactly that area. The reputation transfers; the fault largely does not. Establish which engine is fitted before quoting a chain job.
What it does carry is the modern emissions stack — EGR, particulate filter and AdBlue on most markets — and the EGR module on early B47s was subject to recall for a cracking and overheating risk. Check open campaigns against the VIN. Beyond that, its faults are the diesel duty-cycle faults every engine here shares: filters that cannot regenerate on short journeys, and the cascade of codes that follows.
Cars fitted with this engine
26 generations, across 2 makes. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.
BMW
- 5 Series F10 2010–2017
- X3 F25 2010–2017
- 1 Series F20 2011–2019
- 3 Series F30 2012–2019
- X5 F15 2013–2018
- 4 Series F32 2013–2020
- 2 Series F22 2014–2021
- 2 Series F45 2014–2021
- X4 F26 2014–2018
- 7 Series G11 2015–2022
- X1 F48 2015–2022
- 5 Series G30 2017–2024
- X3 G01 2017–present
- 6 Series G32 2017–2023
- X5 G05 2018–present
- X4 G02 2018–present
- X2 F39 2018–2023
- 3 Series G20 2019–present
- 1 Series F40 2019–present
- X6 G06 2019–present
- 4 Series G22 2020–present
- X1 U11 2022–present
- X2 U10 2023–present
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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